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<title>Groovy Goodness: Implementing MetaClass Methods with Same Name but Different Arguments</title>

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<h3 class="post-title">Groovy Goodness: Implementing MetaClass Methods with Same Name but Different Arguments</h3>

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<p>Using the <code>metaClass</code> property of a class we can add new methods or override existing methods of the class. If we want to add a new methods that have the same name, but different arguments, we can use a shortcut notation. Groovy allows us to chain multiple <code>leftShift()</code> (<code>&lt;&lt;</code>) methods together.</p>
<pre class="brush:groovy">
String.metaClass.groovy &lt;&lt; { Integer number -&gt;
    delegate * number
} &lt;&lt; { String s -&gt;
    delegate + s
} &lt;&lt; { -&gt;
    delegate + ' Groovy rocks.'
}

assert 'GroovyGroovy' == 'Groovy'.groovy(2)
assert 'Hello world from Groovy' == 'Hello world'.groovy(' from Groovy')
assert 'It is true. Groovy rocks.' == 'It is true.'.groovy()
</pre
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